CRUSTACEA OF THE MER&TJI ARCHIPELAGO. 135 



little shorter than the propodites ; they are laterally compressed, 

 elongate-triangular, sharply pointed, and fringed with hairs on 

 the lateral margins. The cephalothorax of the largest specimen 

 IS nearly 10 millim. broad. 



79. DOTILLA INTERMEDIA, n. Sp. (PL IX. figS. 4-6.) 



No fewer than thirty-two specimens, all males, were col- 

 lected on the coast of Sullivan Island. This pretty small 

 crustacean presents a much more striking resemblance to 

 Forskal's JD. sulcata, from the Eed Sea, than D. hrevitarsis, for 

 the cephalothorax is grooved almost in the same manner, and the 

 legs also much resemble those of that species. Nevertheless, it 

 may be distinguished at first sight by the merus-joints of the 

 outer maxillipeds being not longitudinally sulcate as in the 

 typical DotillcB, the internal half of these joints at least being 

 quite smooth. Though these joints are still larger than the 

 ischium-joints, they, however, present a remarkable transition 

 towards the true Scopimercp, in which the merus-joints of the 

 external maxillipeds are as little sulcate as in D. intermedia. 



The cephalothorax nearly resembles that of D. sulcata, being a 

 little broader than long ; as regards the form of the front and 

 the manner in which the upper surface of the carapace is grooved, 

 both species perfectly agree with one another, D. intermedia 

 presenting also a five-rayed star of grooves anteriorly, the frontal 

 groove reaching only to the gastric region. It nevertheless differs 

 from D. sulcata in the presence of a transverse groove close 

 and parallel to the posterior margin of the cephalothorax, 

 which, occurs also in D. hrevitarsis. The gastric region bears 

 five small tubercles, one on the mesogastric, one on each hypo- 

 gastric, and two on the urogastric lobe. The elevated parts of 

 the upper surface are minutely granular, as in the other species. 

 A.S regards the inflected portions of the cephalothorax, D. inter- 

 media agrees with D. sulcata, the pterygostomian and subhepatic 

 regions being sulcate. 



The merus-joint of the outer foot-jaws of D. sulcata is nearly 

 twice as large as the ischium-joint, whereas in B. intermedia 

 (PL IX. fig. 6) it is but little larger. The suture that separates 

 these joints from one another is transverse. The ischium-joint 

 is nearly quadrangular and smooth. The merus-joint is extremely 

 ebaracteristic, and has a more equilaterally triangular form, the 



