1911.] NATURAL SCIENCES OF PHILADELPHIA. 103 



as many minute interstitial ones. Unfortunately, the specimens bore 

 no spermatophores. It may be that further material will show that 

 these represent but an extreme form of L. pealii, but it is not alto- 

 gether impossible that the brevis-hemiptera-brevipinna group includes 

 a number of well-defined races, geographically separated but confused 

 in the literature. 



In conclusion it may be well to call attention to the fact that the 

 male of L. brevis, which has again and again been stated in the litera- 

 ture to be unknown, was well described by Professor Steenstrup 

 himself in his famous paper on Hectocotylus Formation. 1 In the 

 specimens available to me the details of hectocotylization are made 

 out with difficulty, but I can at least confirm his observations. Only 

 the distal portion of the left ventral arm is affected, as in Loligo. The 

 first 18 to 20 pairs of suckers are normal. From this point on the 

 suckers of the dorsal (outer) row undergo rapid modification and 

 become degenerated to rather large flattish papillae. The suckers 

 of the ventral row are but little modified and persist to the tip of the 

 arm. Thus we are still unable to distinguish the genus Lolliguncula 

 from the genus Loligo by any important character save that the 

 female of the former receives the spermatophores of the male upon a 

 calloused patch within the mantle near the left gill, whereas in Loligo 

 they are received on a pad below the mouth. 



Explanation of Plate VI. 



Lolliguncula (?) panamensis n. sp. — Tentacle club and dorsal aspect (nat. size) 

 of type. Drawn by Miss Lora Woodhead. 



1 See English reprint in Ann. Mag. Nat. Hist. (2), XX, 1857, p. 86. 



