492 Dr. Henry Woodward — Cretaceom Crustacea, Denmark. 



two teeth, of which the external one is the larger. The antero- 

 lateral margins (Mia.) are long, much curved, and provided with 

 teeth varying in number and often confluent. The postero-lateral 

 margins (Mpl.) are shorter, nearly straight, and curving inwards ; 

 they are provided in front with one or two more or less indistinctly 

 marked teeth. The posterior margin (Mp.) is generally short and 

 somewhat incurved. The superior surface of tlie carapace is 

 divided transversely into three areas by two sulci (or furrows), 

 the anterior of which is named the cervical furrow (Sc.) (called 

 also the occipital furrow), and the posterior the branchio-cardiac 

 furrow (Sbrc.) or lateral furrow (SI.). The branchio-cardiac 

 furrow is more or less bent backwards, and often takes a sharp 

 curve forwards, and, having received a smaller sulcus from the 

 part in front, it continues on to the arched margin of the carapace 

 forming the lateral furrow (SI.). This sulcus, which marks the 

 middle of the superior surface of the carapace, is indicated only 

 by a notch on the lateral margin over which it passes, and is 

 continued forwards upon the inferior orbital border of the pterygo- 

 stomial region (P.). 



Of the different regions observed on the carapace the epigastric 

 (Ge.) and the mesogastric lobes (Gm.) appear in front of the occipital 

 furrow (also called the cervical furrow) (Sc). The two epigastric 

 lobes (Ge.) are nearly always well marked, and are separated by the 

 frontal furrow (Sf.). The mesogastric lobe (Gm.) is prolonged in 

 front into a narrow point, and divided behind into two parts by 

 a sulcus running lengthwise, and in decorticated specimens, from 

 which the shell has been dissolved away, this furrow is always well 

 defined by two well-marked raised surfaces (these marks being due 

 to the insertion of muscles on the interior of the carapace). Behind 

 the occipital furrow (also called the cervical furrow), in the front 

 part of the centre of the cai'apace, is the broad urogastric lobe (Gu.) 

 (not always well defined). This is separated from the next region 

 by a narrow, plane or concave surface. The cardiac region (G.) is 

 pentagonal, with the pointed portion directed backwards, and on 

 decorticated specimens nearly always marked by three tubercles, 

 forming a triangle; on each side, behind the occipital furrow, are 

 the two large branchial regions (Ba. and Bp.). The anterior 

 branchial regions (Ba.), situated in front of the lateral sulcus or 

 furrow, possess on decorticated specimens, in the centre, a pointed 

 elevation. The posterior branchial regions (Bp.) are of a more 

 or less marked rhomboidal form. Two tubercles can always be 

 seen in decorticated specimens in the middle of the occipital furrow. 

 The pterygostomial region (P.) is very narrow. On this, behind 

 the lower border of the orbit, is a transverse furrow or sulcus, 

 which is often sharply marked, particularly on the inner part, 

 where the region behind is more or less pointed. 



The superior surface is granulated or smooth, the curved part 

 nearly always smooth. In the collections both from Anuetorp and 

 Faxe there are isolated well-preserved claws, which in their short, 

 stout form and the direction of the index and pollex resemble the 



