JAPANESE NUDIBEANÖHS. 21 



Cadlina (or Tyrina) sp. 



One specimen from Ago Bay, Shima. It is 28 mm. in length, 

 18 mm. in breadth and of a uniform greenish brown, which how- 

 ever may not be the original colour. The dorsal surface is 

 covered with warts and prominences of various sizes which are 

 not confluent and are generally separated by an appreciable 

 interval. The margin of the rhinophore pockets is not at all 

 raised : that of the branchial pocket, though only slightly raised, 

 forms a remarkably distinct circle. The branchige are simply 

 pinnate, very small and difficult to count but apparently 9 in 

 number. On either side of the head is a large puffy lobe. These 

 lobes seem to be swollen and distorted but in their natural 

 condition they may have borne indentations as do those of 

 Tyrinna. The whole animal is very flat. 



There is a labial armature of brownish rods, curved and 

 bifid at the tips. The radula is large and the teeth fit closely 

 into one another. The formula is at least 80x100 + 1 + 100, and 

 some rows are a little wider. The median tooth is narrow and 

 bears four claw-like denticles. The first lateral is denticulate on 

 both sides : the rest bear on the outside only 7-9 distinct denti- 

 cles, of which the uppermost in longest. Some scales were found 

 in the vas deferens and on the verge, but no spines were visible, 

 though their absence cannot be considered certain. 



Three species of Cadlina are known from the American side 

 of the northern Pacific, namely C. pacifica Bergh, C. marginata 

 MacFarland C. flavomaculata MacFarland, but this specimen can- 

 not be referred to any of them. But owing to its distorted 

 condition it is impossible to say whether it is a Cadlina or a 

 Tyrinna and it therefore seems better to leave it unnamed. 



Genus Sphaerocloris Bgh. 



(See especially Bergh : Kritische Untersuchung dir Ehrenberj sehen Doriden in. Jahrbuch d. 

 deutschen malakozool. Ges. 1877, pp; 65-67). 



It is not easy to decide whether this genus should be called 

 Actinocyclus or Sphaerodoris. The former name (Ehrenberg 1831) 



